Drawing instrument



FIG. 1 is a top plan view of my new design;

FIG. 2 is a side view of FIG. 1;

FIG. 3 is a bottom view of FIG. 1;

FIG. 4 is an inverted opposite side view of FIG. 2;

FIG. 5 is a front view of FIG. 1; and,

FIG. 6 is a rear view of FIG. 1. 

The ornamental design for a drawing instrument, as shown and described. 